<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <el-table :data="rolesList" border style="width: 100%" stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template v-slot="scope">
                        <el-row v-for="(items,i1) in scope.row.children" :key="items.id"
                            :class="['bdbottom',i1===0?'bdtop':'','vcenter']">
                            <el-col :span="5">
                                <el-tag closable @close="removeRoleById(scope.row,items.id)">{{items.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="19">
                                <el-row v-for="(item2,i2) in items.children" :key="item2.id"
                                    :class="[i2===0?'':'bdtop',,'vcenter']">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRoleById(scope.row,item2.id)">
                                            {{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id"
                                            closable @close="removeRoleById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column prop="roleName" label="角色名称"></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
                <el-table-column prop="authName" label="操作">
                    <template v-slot="scope">
                        <el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
                        <el-button type="danger" size="mini" icon="el-icon-delete">删除</el-button>
                        <el-button type="warning" size="mini" width="300px" icon="el-icon-setting"
                            @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限区域 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all
                :default-checked-keys="defkeys" ref="treeRef">

            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: 'Roles',

        data() {
            return {
                rolesList: [],
                setRightDialogVisible: false,
                // 所有权限的数据
                rightsList: [],
                // 树形控件的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },
                // 默认选中的复选框的id值
                defkeys: [],
                // 当前即将分配权限的角色id
                roleId: ''
            };
        },

        created() {
            this.getRolesList()
        },

        mounted() {

        },

        methods: {
            async getRolesList() {
                const { data: res } = await this.$http.get('roles')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取角色列表失败')
                }
                this.rolesList = res.data
            },
            async removeRoleById(role, rightId) {
                const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)

                if (confirmResult !== 'confirm') {
                    this.$message.info('取消删除')
                }

                const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if (res.meta.status !== 200) {
                    return this.$message.error('删除失败!')
                }
                role.children = res.data
                this.$message.success('删除成功')
            },

            async showSetRightDialog(role) {
                this.roleId = role.id
                const { data: res } = await this.$http.get('rights/tree')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取权限失败')
                }
                this.rightsList = res.data

                this.getLeafKeys(role, this.defkeys)
                this.setRightDialogVisible = true
            },
            // 递归获取默认选中的复选框的id值
            getLeafKeys(node, arr) {
                if (!node.children) {
                    return arr.push(node.id)
                }

                node.children.forEach(item => {
                    this.getLeafKeys(item, arr)
                });
            },
            // 监听分配权限对话框的关闭事件
            setRightDialogClosed() {
                this.defkeys = []
            },
            // 点击为角色分配权限
            async allotRights() {
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]

                const idStr = keys.join(',')

                const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
                if (res.meta.status !== 200){
                    return this.$message.error('分配权限失败')
                }
                this.$message.success('分配权限成功')
                this.getRolesList()
                this.setRightDialogVisible = false
            }
        },
    };
</script>

<style scoped>
    .el-tag {
        margin: 7px;
    }

    .bdtop {
        border-top: 1px solid #eee;
    }

    .bdbottom {
        border-bottom: 1px solid #eee;
    }

    .vcenter {
        display: flex;
        align-items: center;
    }
</style>